1. Damrin, Dora E. “A Comparative Study of Information Derived From a Diagnostic Problem-Solving Test by Logical and Factorial Methods of Scoring”, University of Illinois Doctoral Dissertation, University Microfilms Publications, No. 4428 (1952), page 6.
2. Davis, Frederick B., Educational Measurements and Their Interpretation (Belmont, California: Wadsworth Publishing Company, 1964), p. 422.
3. Scoring Formulas that “Correct for Guessing”
4. Does the True-False Scoring Formula Work? Some Data on an Old Subject